GrumpyGregry
Here for rides.
something for one of mr garmins finest, if somewhat retro, Etrex HCx units would be splendid. LB appeals as it is one less change on the way up.How long is a piece of string?
On my own (apart from the middle section when I joined Dodo's gang), and returning by a slightly different route, and with two stops rather than three, but going about the right distance over about the right terrain, I was out between 10:15 and 16:30 for five hours of riding. And I'm no racing snake.
I'd guess that if we manage to set off by 9:45 and are reasonably disciplined about faffing and lucky with mechanicals we could easily expect to be back by 18:00. But it's light until gone 19:00.
There are pubs in Amersham for post-ride refreshment.
For a local-road route from London Bridge to Marylebone, if you've got one of Mr Garmin's excellent wayfaring devices, drop me a line and I'll wing you the conventional commuting route via Bloomsbury.
my concern re finish time is merely because it is a three hour rail-bike-rail journey to get home.